Finding the Fourth Proportional to 21,602.72, 32,384.64 and 7,748.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,602.72 : 32,384.64 = 7,748.48 : x
2. Step 2: Convert to fraction form
   21,602.72/32,384.64 = 7,748.48/x
3. Step 3: Cross multiply
   21,602.72x = 32,384.64 × 7,748.48
4. Step 4: Simplify right side
   21,602.72x = 250,931,735.35
5. Step 5: Solve for x
   x = 250,931,735.35/21,602.72
6. Step 6: Final answer
   x = 11,615.75